<template>
    <div id="app">
        <div id="nav">
            <router-link to="/">Home</router-link> |
            <router-link to="/about">About</router-link> |
            <router-link to="/list">List</router-link> |
            <router-link to="/carousel">Carousel</router-link> | 
            <router-link to="/signature">Signature</router-link>
        </div>
        <keep-alive>
            <!-- 这里是会被缓存的视图组件，比如 Home！ -->
            <router-view v-if="$route.meta.keepAlive"></router-view>
        </keep-alive>
        <!-- 这里是不被缓存的视图组件，比如 Edit！ -->
        <router-view v-if="!$route.meta.keepAlive"></router-view>
    </div>
</template>

<style lang="less">
#app {
    text-align: center;
    color: #2c3e50;
}
#nav {
    padding: 30px;
    a {
        font-weight: bold;
        color: #2c3e50;
        &.router-link-exact-active {
            color: #42b983;
        }
    }
}
</style>
